Flue bushing



April 1, 19.30. c TATAREK 1 1,753,098

FLUE BUSHING Failed Sept. 12, 19?

ummml Patented Apr. 1, 1930 UNITED STATES FLUE BUSHING Application filed. September 12, 1925. Serial No. 56,094.

This invention relates to means for holding flues in the flue sheets, the general object of the invention being to provide means for making a waterproof connection between the parts so as to prevent all danger of leakage of water or steam.

This invention also consists in certain other features of construction and in the combination and arrangement of the several parts, to be hereinafter fully described, illustrated in the accompanying drawings and specifically pointed out in the appended claim.

In describing my invention in detail, reference will be had to the accompanying drawings wherein like characters denote like or corresponding parts throughout the several views, and in which Figure 1 is a view showing the invention in use.

Figure 2 is a longitudinal sectional view through the flue and its connecting member. Figure 3 is an end view of one of the bushings.

In these views, 1 indicates a flue and 2 the sheets to which the fines are to be connected. The ends of each flue are threaded exteriorly to receive the interior threads of the bushings 3 and 4. Each bushing is also exteriorly threaded, the bushing 3 having its exterior threads engaging the threaded sleeve 5 which is welded or otherwise fastened to the interior face of the flue sheet which is engaged by the bushing 3, this sleeve forming a continuation of each hole in the flue sheet through which the bushing 3 passes. The exterior threads of the bushing 4 engage the threaded wall of each hole formed in the other flue sheet. The head 6 of each bushing is rounded, as shown to receive the beading tool, and each head is provided with a projection 6 for engaging a notch in a socket wrench so that the bushing can be turned by the wrench. This projection can be cut off after the bushing has been put in place, if desired. Each of the bushings 3 is provided with a tubular extension 7 at its center which extends into the flue, so that the end of the flue passes between this extension and the threaded part of the bushing. Gaskets 8 may be used on the bushings for helping to make a water and steam tight junction of the parts. The sleeves 5 are welded in place, so that they form part of the sheet to which they are attached.

From the foregoing, it will be seen that I have provided means for making a water and steam tight joint of a flue with its sheets and with this invention, it is not necessary to remove all flues when some of the tines begin to leak as it is only necessary to remove the bushings of the defective fiues.

It is thought from the foregoing description that the advantages and novel features of my invention will be readily apparent.

I desire it to be understood that I may make changes in the construction and in the combination and arrangement of the several parts, provided that such changes fall within the scope of the appended claim.

What I claim is In combination with a fluesheet having a 7 plain hole therein and an internally threaded sleeve surrounding the hole and fastened to the inner face of the sheet, the internal diameter of said sleeve being of smaller diameter than the hole, a bushing passing through the hole and externally threaded to engage the sleeve, a flue extending into the bushing and threaded thereto, said bushing having an exterior head, the outer face of which is rounded to be engaged by a heading tool, a wrench engaging projection on said head and a tubular extension formed integral with the head and passing into the end of the flue.

In testimony whereof I aflix my signature.

JOSEPH G. TATAREK. 

